I'm not a DWC expert, but the original was from 2010 and the Treasure Rally one is recent. I'm not sure if there's a difference, but I would have to assume that the newer one might be painted in a higher quality way.
kasplant Are you on Facebook? There's a great group of DBZ WCF collectors on there. You can probably find someone who owns both on there. We don't have a ton of currently active DBF members on here who specialize in collecting WCF anymore. Someone might be able to help on DBF, but it might be worth joining this group as well: www.facebook.com/groups/138992146686135/